I found this

(http://social.technet.microsoft.com/wiki/contents/articles/6460.simulating-touch-input-in-windows-developer-preview-using-touch-injection-api-en-us.aspx)

but it is work only on Windows 8.  I want simulate touch contact on WINDOWS 7. I know about WM_touch and think I must use WM_TOUCH for simulate touch. Please help. How I can create(simulate) touch contact on Windows 7?

You’re right, the TouchInjection API is unique to Windows 8.
For Windows 7 you have to go through a lot of pain to generate WM_TOUCH events, because only drivers can do this. And writing a driver for Windows 7 is no walk in the park.
You might want to take a look at the source code of MultitouchVista: http://multitouchvista.codeplex.com

But if you want to take my advice: Don’t. Windows 8 will be available within weeks (if you don’t already have access), it’s a LOT faster than Windows 7 and is designed for multitouch. Then you could use the TouchInjection API yourself. (Or wait until I finished my TUIO->TouchInjection app )